Security group: use correct logging format
Security group: use correct logging format

Commit ef29f7eb9a2a37133eacdb7f019b48ec3f9a42c3 added a warning
that is not in the standard format. This patch fixes that and
also tweaks the indentation.

TrivialFix

Change-Id: Ib1fb1688b9421b27d2dec27017ab9f3fdc158497

cloudbase/neutron,huntxu/neutron,igor-toga/local-snat,wolverineav/neutron,noironetworks/neutron,dims/neutron,openstack/neutron,klmitch/neutron,eayunstack/neutron,wolverineav/neutron,openstack/neutron,bigswitch/neutron,noironetworks/neutron,sebrandon1/neutron,mahak/neutron,eayunstack/neutron,cloudbase/neutron,dims/neutron,MaximNevrov/neutron,openstack/neutron,sebrandon1/neutron,mahak/neutron,MaximNevrov/neutron,igor-toga/local-snat,bigswitch/neutron,huntxu/neutron,klmitch/neutron,mahak/neutron